Things?

For some reason whenever I post a thing (like a weapon or a monster) It doenst show up in 3D mode? Is there something im doing wrong? could you possibly help? (Im sorry if this is spam Im ingnorant) Also when I make a room the walls all have the logo of the space company on them. Its kind of noobish looking (figures since im a noob). how do I change this?

Press T in 3D mode to toggle things on/off.